'About what?' I said innocently. 'About you two getting lucky tonight,' she replied. 'No, but I want you to put on your sexiest panties and bra when w... get back,' I replied. 'No,' she replied, 'I told you you can forget about that'. I said, 'I want you wearing those so I can have you dressed a like a slut but only I’ll know it.' 'Forget it,' she said. I thought that was it, she wasn't interested, but then when she said, 'Anyway, I didn't bring any sexy panties with me,' I knew she was up for. Rather than reach for his hands, her hands fell to her waist where the undid the button and zipper of the skirt she was wearing and allowed it to drift over her hips to the floor. Now she took his hand and stepping out of the skirt which was pooled at her feet, moved to him and between his legs to again kiss his chest and hold herself against him as the evening of love began.His mind reeled with the presence of her as she moved lower on his body and sucked him deep into her mouth. The heat. When I got back Lisa was already half-way naked, only wearing her lacy bra and pretty panties, the crotch of which I could see had been dampened by something other than the rain. Lisa asked if I would un-clasp her bra for her, which I was happy to do. Then she removed it and pushed her panties down and stepped out of them. She looked absolutely and stunningly gorgeous and delicious……like a Greek goddess in all of her glory. My hot rod was throbbing with lust and in anticipation of what was yet. When they entered the room Derek moved over to me and planted a long sloppy kiss on my lips. When we moved apart he gestured to Charlie to sit down on the bedside chair. he opened his holdall and proceeded to tie Charlie onto the chair - making sure his hands and feet were totally immobilised. Charlie was now in no position to interfere with anything that was now to occur.Derek now asked me to raise my hands above my head and when I complied he fished out some silken rope and tied them.